Atec Agilent-34972A - Manual (Page 9)

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And the 34970A/34972A measures and converts
11 different input signals:
• temperature with thermocouples, RTDs,
and thermistors
• dc and ac volts
• 2- and 4-wire resistance
• frequency and period
• dc and ac current
What’s more, each channel is independently configurable.
This means you can configure channel 1—for dcV, channel
2 for a K-type thermocouple, and channels 3 and 13 for a
4-wire RTD measurement—all on the same module, all in a
single scan. For custom linear conversions, use the Mx+B
scaling function on any channel. You can even display a
custom 3-character engineering label like RPM or PSI to
identify your measurement units.
Versatile alarms
Alarms are available on a per-channel basis as well.
Enter a high limit, a low limit, or both. The 34970A/34972A
compares each reading to its limits and flags any out-of-
range measurements. You can assign one of four TTL
alarm outputs to any input channel to trigger external
alarm lights, sirens, or send a TTL pulse to your control
system, all without a PC connected.
Scanning made simple
The 34970A/34972A automatically builds a scan list that
includes all configured inputs (even digital inputs from the
Agilent 34907A multifunction module) in ascending order
by channel number. You can pace scans by setting the
34970A/34972A’s internal timer for automatic scanning
at a specific interval, by manually pressing a front-panel
button, or by sending a software command or external
TTL trigger pulse.
Monitor any input
A special display mode monitors a selected input channel,
continuously updating the display with new readings—even
during a scan. Or, when using the 34972A with built-in LAN,
the channels can be monitored over the network using the
graphical Web interface. It’s great for keeping an eye on a
key input, or for troubleshooting your system before a test.
Non-volatile memory and USB fl ash drive adds
convenience, portability
All readings are automatically time-stamped and stored in
a nonvolatile 50,000 reading memory—enough memory
to hold more than a week’s worth of data (20 channels
scanned every five minutes). The nonvolatile memory holds
your data even after power is removed, so you can use the
34970A/34972A to collect data at a remote location for
later uploading to a PC. Or if you need even more memory,
the 34972A’s USB port can be used to log data directly
to a USB flash drive or to copy the data from the reading
memory without being connected to a computer.
Data logging feature checklist
• From 1 to 120 channels of analog input
• Measurements include dc volts, ac volts, thermo-
couple, thermistor and RTD temperature measure-
ments, 2- and 4-wire Ohms, dc current, ac current,
frequency, and period
• 6½ digits (22 bits) of resolution with 0.004% basic
1-year dcV accuracy
• 50 k reading nonvolatile memory including time-
stamp
• Scaling and alarms available on each channel
• Full-featured front panel for stand-alone configura-
tion, troubleshooting, and data viewing
• BenchLink Data Logger 3 software for configura-
tion and data analysis
• Nonvolatile storage for five complete instrument
states
• Built-in LAN or USB interfaces to support remote
data logging applications (34972A only)